Improve empty states for TODOs and issues

app/views/dashboard/todos/index.html.haml

@@ -83,12 +83,12 @@
         You're all done!
   - elsif current_user.todos.any?
     .todos-all-done
-      .svg-content
+      .svg-content.svg-250
         = image_tag 'illustrations/todos_all_done.svg'
       - if todos_filter_empty?
         %h4.text-center
           = Gitlab.config.gitlab.no_todos_messages.sample
-        %p.text-center
+        %p
           Are you looking for things to do? Take a look at
           = succeed "," do
             = link_to "the opened issues", issues_dashboard_path
@@ -104,7 +104,7 @@
         = image_tag 'illustrations/todos_empty.svg'
       .todos-empty-content
         %h4
-          Todos let you see what you should do next.
+          Todos let you see what you should do next
         %p
           When an issue or merge request is assigned to you, or when you
           %strong

app/views/shared/empty_states/_issues.html.haml

@@ -18,7 +18,10 @@
           - if project_select_button
             = render 'shared/new_project_item_select', path: 'issues/new', label: 'New issue', type: :issues
           - else
-            = link_to 'New issue', button_path, class: 'btn btn-new', title: 'New issue', id: 'new_issue_link'
+            = link_to 'New issue', button_path, class: 'btn btn-success', title: 'New issue', id: 'new_issue_link'
       - else
+        %h4.text-center There are no issues to show
+        %p
+          The Issue Tracker is the place to add things that need to be improved or solved in a project. You can register or sign in to create issues for this project.
         .text-center
-          %h4 There are no issues to show
+          = link_to 'Register / Sign In', new_user_session_path, class: 'btn btn-success'

config/no_todos_messages.yml

@@ -3,9 +3,9 @@
 #
 # If you come up with a fun one, please feel free to contribute it to GitLab!
 # https://about.gitlab.com/contributing/
---- 
-- Good job! Looks like you don't have any todos left.
+---
+- Good job! Looks like you don't have any todos left
 - Isn't an empty todo list beautiful?
 - Give yourself a pat on the back!
 - Nothing left to do, high five!
-- Henceforth you shall be known as "Todo Destroyer".
+- Henceforth you shall be known as "Todo Destroyer"